It's expected to attract over 750,000 people to the region.
The Fleadh Cheoil will be returning to Westmeath in 2022.
Mullingar was due to host the traditional music festival both last summer and in the coming months but both fell foul to covid-19.
Director General of Comhaltas Ceoltóirí Éireann confirmed the news yesterday afternoon.
The annual festival is expected to attract over 750,000 people and generate €50 million in revenue for its host town.